Phantom Entry on ODL Japan.

I put a BUY STOP order in for EUR/USD at 1.3182 a few mins ago and a SL order at 1.3171. The LONG order got hit and then price went South and hit my SL.
The thing is EUR/USD NEVER hit 1.3182 but my order was filled and then I got reamed.

Any thoughts about how this could be possible without any underhanded stuff?

spread could have widened - hitting your stop.

Just called ODL who claims that their MT4 platform ticks are based on the bid not the ask? Still doesn't make sense as, the spread is still 2 pips.